1 #include <console/console.h>
4 #include <device/device.h>
5 #include <device/pci.h>
10 #include "northbridge.h"
13 static void ram_resource(device_t dev, unsigned long index,
14 unsigned long basek, unsigned long sizek)
16 struct resource *resource;
21 resource = new_resource(dev, index);
22 resource->base = ((resource_t)basek) << 10;
23 resource->size = ((resource_t)sizek) << 10;
24 resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE | \
25 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
28 static void tolm_test(void *gp, struct device *dev, struct resource *new)
30 struct resource **best_p = gp;
31 struct resource *best;
33 if (!best || (best->base > new->base)) {
39 static uint32_t find_pci_tolm(struct bus *bus)
44 search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test, &min);
46 if (min && tolm > min->base) {
52 #if CONFIG_WRITE_HIGH_TABLES==1
53 #define HIGH_TABLES_SIZE 64 // maximum size of high tables in KB
54 extern uint64_t high_tables_base, high_tables_size;
57 static void cpu_pci_domain_set_resources(device_t dev)
59 static const uint8_t ramregs[] = {
60 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x56, 0x57
65 pci_tolm = find_pci_tolm(&dev->link[0]);
66 mc_dev = dev->link[0].children;
68 unsigned long tomk, tolmk;
69 unsigned char rambits;
72 for(rambits = 0, i = 0; i < ARRAY_SIZE(ramregs); i++) {
74 reg = pci_read_config8(mc_dev, ramregs[i]);
75 /* these are ENDING addresses, not sizes.
76 * if there is memory in this slot, then reg will be > rambits.
77 * So we just take the max, that gives us total.
78 * We take the highest one to cover for once and future coreboot
79 * bugs. We warn about bugs.
84 printk_err("ERROR! register 0x%x is not set!\n",
88 printk_err("RAM size config registers are empty; defaulting to 64 MBytes\n");
91 printk_debug("I would set ram size to 0x%x Kbytes\n", (rambits)*8*1024);
92 tomk = rambits*8*1024;
93 /* Compute the top of Low memory */
94 tolmk = pci_tolm >> 10;
96 /* The PCI hole does not overlap the memory. */
100 /* Report the memory regions. */
102 ram_resource(dev, idx++, 0, 640);
103 ram_resource(dev, idx++, 768, tolmk - 768);
105 #if CONFIG_WRITE_HIGH_TABLES==1
106 /* Leave some space for ACPI, PIRQ and MP tables */
107 high_tables_base = (tomk - HIGH_TABLES_SIZE) * 1024;
108 high_tables_size = HIGH_TABLES_SIZE * 1024;
111 assign_resources(&dev->link[0]);
114 static void cpu_pci_domain_read_resources(struct device *dev)
116 struct resource *res;
118 pci_domain_read_resources(dev);
120 /* Reserve space for the IOAPIC. This should be in the Southbridge,
121 * but I couldn't tell which device to put it in. */
122 res = new_resource(dev, 2);
123 res->base = 0xfec00000UL;
124 res->size = 0x100000UL;
125 res->limit = 0xffffffffUL;
126 res->flags = IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED |
129 /* Reserve space for the LAPIC. There's one in every processor, but
130 * the space only needs to be reserved once, so we do it here. */
131 res = new_resource(dev, 3);
132 res->base = 0xfee00000UL;
133 res->size = 0x10000UL;
134 res->limit = 0xffffffffUL;
135 res->flags = IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED |
139 static struct device_operations pci_domain_ops = {
140 .read_resources = cpu_pci_domain_read_resources,
141 .set_resources = cpu_pci_domain_set_resources,
142 .enable_resources = enable_childrens_resources,
144 .scan_bus = pci_domain_scan_bus,
147 static void enable_dev(struct device *dev)
149 /* Set the operations if it is a special bus type */
150 if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
151 dev->ops = &pci_domain_ops;
156 struct chip_operations cpu_emulation_qemu_x86_ops = {
157 CHIP_NAME("QEMU Northbridge")
158 .enable_dev = enable_dev,
161 void udelay(unsigned usecs)
164 for(i = 0; i < usecs; i++)